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BQ24172: Is high side MOSFET always on during fast charge state?

Part Number: BQ24172

Hello, TI experts

When BQ24172 works at fast charge stage, and suppose everything is fine, that means voltage on Fb is less than 2.1V, Tj is < 120, not over current, etc. On that condition, is the high side MOSFET always on?

Best Regards

Yang